Variable line spacer for typewriters



May 29, 1923.

Of A. HOKANSON VARIABLE LINE SPACER FOR TYPEWRITERS 2 Sheets-Sheet 2 Filed Oct'. 14 1920 #10T/Essig Zyl I I iatented May 29, i923.

OTTO A'. ,HOKANsOiL or woOnsTocmiLLrNors, AssrGNOit 'ro woonsrooxtfrirn- WRITER COMPANY', or woonsroomfrrmnors,Al CORPORATION or I'I,i:'t1 \ToIs.-"'1,jl

VARIABLE LINE SPACER vSFOR TYPEWRITES, 'l

Application le'd October 14,1920. ,SerialNol 416,804, j

. platenvarious lamounts differing n. from the ordinary line spacing. l y y f The invention has for its objectthe Vpros vision of mechanism of the class znamed, which shall be of improved construction and operation. It is exemplified in the combinaf tion and arrangement of parts shown in the accompanying drawings, and ldescribed in the following speciication, and is more particularly pointed out in the appended claims. In the drawings, Figure 1 is a longitudinal section of one form of device embodyingthe present invention.

Figure 2 is a transverse section on line 2 2 of Figure 1.

Figure 3 is a transverse section-.on line 3 -3 of Figure 1. f

Figure 4 is a view similar to Figurevl, showing a slightly modified form of the invention.

Figure 5 is 'a section on line ure 4. v

Figure 6 is a fragmentary detail of one of the parts; and,

Fig. 7 is an elevation looking from Vthe tree Fignaht in rig. e.

Y` -eferring first to the form of invention shown in Figures 1, 2, 3, 6 and 7 the nu-A meral 10 designates a typewriter platen fixedly mounted on a platenshaft 11, which is journaled in a platen carriage, a portion yof which is shown at 12. Theend ofthe shaft 11 protrudes through the bearing portion of the carriage 12, and is surrounded by a sleeve 13, rwhich forms a bushing journaled. in the carriage 12. The shaft 11 extends beyond the bushing 13, andtheend of the shaft is provided with a stem `14 secured to the sleeve13 by a set screw l15 and fastened to the end of the shaft 11 by a set screw 16, so that when the parts are assembled, the shaft v11, the sleeve 13 and the stem 14 are HOKANSON, a j

iXedlyV-securedtogether.I A- finger where-11.172191 i is molded. orf/.otherwise rigidly vsecured on the'end of the stem 14. The platen shaftf 11', as shownv in Figures 6 and?, is provided..y y

witha groove 18 milled inone side thereof,

the wallsrof the groovey being inclined outwardly toward. the periphery ofthe shaft. A rod 19 is seated in thegroove 18 andextends through a central opening in theend of y thestud `14. A knob 20 isfiXed tothe pro-y jecting end ofthe rod 19 by a set screw, 21. Theknob-2O is provided with a flange4 Y 22,' whichloosely fits the projectingend ofthe Y' stem 14, and has a limited lrotary movement relative to the stem. A screw 23 is threadedthrough the flange, 22 and extends intoa, Slot, v. p y v 24 in the stem 14, as shown in Figure 3; ,Thev

screw 23 `limits the amount of .movement of the knob-2O relative'to the'stem 14.j y

The inner endof the sleeve13 is provided with a flanged disk 25 having opposite portions of the periphery thereof flattened to l, form bearing surfaces 26k and 27.- A disk 28` A g v is journaledon the sleeve 13 adjacent the c outer face of the flange 25,. and is provided,

-withfa anged ring 29, which surrounds the flangeddisk-25, and liesadj acent the periphery thereof. A paireo'f oppositely disposed rollers 30 -and"` 31 'isinterpOSedbetWeen the bearing surface 26, `and :the Vinnerffacey of theringv29. The .rollers 30 and 31rv are looselyjournaledI on .pins 32 and 33,A whichv 34 `and 35 and normally 'presses'the'rollers spring 43; '1.

Thesleevel is Vprovided with a''projeotingv i vbearing/14 on which'is pivoted a cam lever v 445, having opposite-endsfthereoff interposed .Y p' Y 100 between-tail pieces 46 onthe tumblers 34 35,`

' are'respectively'carriediby tumblers 34 and,l

35 pivoted to thev inner face ofv theflan'ge.

25` by screws.; 36 and 37. A-.conipressio'nv y spring 38 is vinterposed between the tumblers j 41 and'42; The inner endlofthe rod-19 is provided with a right angle portion-47,1, -KYJ 'i which fits into a slot inthe -camxlever 45, so j that rotation of the rod-19 aboutfitsyaxisdl will shift the lever 45 upon itspivotal bearing 44. Aratchet rwheel 48 fisvrigidly fixed.

pg 'l inserire V25, and hence to the platen, since the disk is iXedly secured to the platen shaft. The

v`clutch rollers are continually held tightly betvveen the bearing surfaces so that there is no possibility or" lost motion between the parts 25 and 28. lt it is desired to rotate the platen by the finger Wheel 17, this is accomplished 2in the usual manner, since the linger Wheel is rigidly connected with the platen. The rotation ot the tinger Wheel 17 in either direction will carry the ratchet Wheel 14 in unison with the platen through the action ot theclutch rollers()I` 39 and 40,

*It it is desired at any time to rotate the platen independently of the ratchet Wheel 48 for adjusting the position ot the paper, or otherpurpose, this may be done by merely rotating the knob 20 in the direction in which it is desired to move the platen. When the knob 20 is turned, the rod 19 Will transmit the rotary movement to the cam h lever 45. i-issuming that the rotation is in a broken lines, compressing counter-clockwise direct-ion, as vieived in Figure 2, the cam lever 45 will be moved into Athe broken Vline position shown in that figure. This movement Will tilt the tuinblo'rs 34 and 41 into the position shown in the springs 38 and 43, and leaving the disk 25 lree to move in a. counter-clockwise direction relative to the flange 29;.` The rollers 81 and 40 will not y oppose such counter-clockwise movement,

'for the reason that such movement tends to Jfree these tivo rollers :trom holding engagement betiveen their contact surfaces, as Will be readily apparent. lVhen the clutch rollers have thus been released, 'further rotation i of `the knob 2O will cause the right angular portion 4f? ot the rod 19 to engage the tace of the groove 18 in the platen shaft 11, and

also the edge oi.l the opening in the bearing 44, through which the rod project-s, so that the platen sha-tt 11 Will be turned With the knobl 20, and the platen may thus be shifted to the desired position. .Rotation ot vthe knob 20 inthe opposite direction will pro duce a similar result upon the clutch rollers 'y Bland 40, so that the platen maybe rotated in either direction entirely independently ot the ratchet Wheel 48 by merely turning the knob in' the direction desired.

l Theslot 24 and set sere-W 23 provide limit kstops for the movement of the knob 2O relative to thestem 14,A so that in case the torsion on the rod 19 produces too great a 'the carriage 12, this `may be done by loosening the set screv: 16, and sliding the platen shaft 11 endivise to the right, as viewed in Figure 1. This Will Withdraw the platen shatt 1from the sleeve 13 Without disturbing the assembled relation of the operating mechanism. ri cover plate 5() may be removably secured to the iiange 29 to form a housing tor the clutch rollers and their op erating parts. i

rlhe modification shown in liigureslland 5 is similar to the 'torni already described, eX- cept that the finger wheel 52 for the ordinary rotation oiE the platen is secured to the stern 14 outside of the platen adjusting disk 53 instead oi on the inner side o1 the adjusting knob, as shoivn in Figure 1. ln the modiied construction, a collar 54 to Which the adjusting Wheel 5S is secured, is jouiiialed on the stem 14 and is provided with a. stud screw 55, which closely tits an opening in the collar and extends through a slot 56 in the stem. rThe inner end ot the stud sci-ev,7 is provided with a reduced thread-o ed portion 5T, Which is threaded into a transverse opening 58 in the rod 19. This ai'g rangement ivill hold the Wheel 58 and the rod 19 for rotation in unison with one another Without causing the rod or Wheel .to bind upon the stem 14. The rotation of the Wheel 53 will act in the same way as the rotation ot the knob 20, to iirstrrelease the clutch rollers and then rotate the platen'iiidependently of the ratchet wheel 48. The platen shatt in this case may be Withdrawn Without disturbing the operating mechanism by releasing the set screw 16. A Washer. 59 may be interposed between the lever 45 and cover plate 50 to preventsliding ot the lever on its bearing 44.

l claim: Y

1. The combination with a rotary platen,

oif a line spacing Wheel loosely mounted thereon, a roller cliitchjtor causing said Wheel and platen to rotate in unison with one another, and means `iter rotating said platen having drivingconnection with said platen independent ot said line spacing wheel and roller clutch, said means coinprisiiig a rotary men'iber ariai'iged to release said clutch during an linitial rotation and to rotate said platen during a continuation oi' the rotation ot' said member subsequent to the release ot said clutch.

2. The combination with a typewriter. platen, oill af line spacing ivlieeljou'rnaled tor rotation relative thereto, said platen and Wheel having oppositely arrangedsur-` faces centrally separated and inclined toward one another at opposite sides of the centrally separated portions, rollers interposed between said surfaces, yielding means for pressing saidA rollers away from one another into the bites formed by said surfaces to cause said platen and wheel to move together, and means arranged to rotate on the axis of said platen for releasing said rollers and rotating said platen independently of said line spacing wheel.

platen and a ratchet wheel mounted to -rotate relative thereto, of a roller for holding said platen and ratchet to rotate in unison with one another, a device arranged to rotate` upon the axis of said platen for releasing said roller to permit rotation of said platen independently of saidl ratchet and means having a limited movement relative to said platen for operating said device, said means being arranged to rotate said platen when actuated beyondv its limited movement tive thereto. t

4i. The combination with a typewriter platen, of a line spacing wheel journaled for rotation relative thereto, oppositely disrelaposed surfaces on said wheel and platen andv iclined toward one another, a clutch roller interposed between said surfaces, an operating member for said roller a cam lever rotatable about the axis of said platen for releasing said roller and a rod arranged axially of said platen and having a limited rotary movement relative thereto for operating said cam lever.

5. rlhe combination with a typewriter platen and a line spacing wheel journaled for rotation relative thereto, of clutch inembers secured to said platen and wheel and having oppositely disposed surfaces inclined toward one another, a roller interposed between said surfaces, an operating member 'on which said roller is loosely journaled, a

device pivoted forrotation about the axis of said platen for moving said operating member to release said roller, and a single member for operating said pivoted device to release said roller and for rotating said platen when said roller has been released.

6. The combination with a typewriter platen having a platen spindle, a line spacing wheel journaled for rotation on said spindle, roller clutch mechanism for securing said wheel and platen for rotation in unison with one another, a device rotatable about the axis of said platen for releasing said clutch mechanism, a rotary finger piece 'having a lost motion connection with said lspindle independent of said roller clutch and means having a limited movement relative to said platen spindle for causing said linger piece to operate said releasing device during an initial movement thereof.

7. The combination with a typewriter platen, a platen spindle, and a frame in which said platen is journaled, of aline spacing'wheel mounted on said spindle lfor rotation relative thereto, rotary clutch mechanisni forcausing said platen and wheel to rotate in unison with one another, means for releasing said clutch mechanism to permit independent rotation of said platen and wheel,y and a sleeve journaled in said frame forv supporting `said clutch mechanism, and, y eperating means independent of said platen 3. The combination with a typewriter spindle. y

8. The combination with a typewriter platen, a platen spindle and a carriage in which said spindle is ljouriialed for reta-v tion, of a sleeve surrounding said spindle and joiirnaled in said carriage, .a line spac ingV wheel journaled on said sleeve, rotary clutch mechanism carried by said sleeve for holding said platen and wheel for rotation in unison with one another, operatingmeans secured to said sleeve for rotating said platen, an axially arranged rod in said spindie lhaving a limited rotary movement 'relative thereto for controlling said'v clutch mech anisin, means supported by said sleeve for `actuating saidrod and means for releasably securing said spindle in said sleeve so -that said platen and spindle may be removed from said carriage without disturbing the ifa.

assembled relation of said clutch'niechanism and its operating parts.

9. The combination 'with a typewrite platen and a spindle therefor, ofy a disk secured to said spindle and having a portion of the periphery thereof flattened to form a continuous bearing surface,` a ring sur rounding said disk and connected with saidl line spacing wheel, oppositely disposed" clutch rollers interposed between said fiat surface andthe Ainner face of said ring, a spring for forcing said rollers into the bites another, and means for moving one of said rollers in the direction of'rotation of said .dish and spindle to free said disk from said line spacing wheel.

k formed by said surfaces, meansvfor rotating l said dislr and spindle in'unison with one f IOQThe combination with a platen and' l n a spindle therefor, of a line spacing wheel journaled for rotation about the aXisof said platen, a clutch disk secured to'said spindleaiid having oppositely disposed segmental tive movement of said platen and line spac,-

ing wheel, springs for forcing said rollers away from one another into engagement with the bearing surfaces of said disk and ring, vand mechanism for releasing said'rol- 1ers to permit' rotation of said platen independently of said line spacing wheel.

ll. The combination' of a typewriter t@ meen@ platen and a spindle therefor, of a sleeve surrounding said Spindle, platen earriage in which said sleeve is jonrnaled, a line spaeing Wheel inonnted on said Sleeve for rotation relative to said platen, a dis i Connected with said platen and having a flat peripheral portion thereon, a ring` secured to seid line spaeinY Wheel and surrounding said disk, e, pair of rollers interposed between .ftaid disk and ring, tumhlere pivoted on said disk and having operating pins loosely enraging Said rollers, springs eonneeted with seid tanhlers for 'forcing said rollers op poslteljv7 into engagen'ient With the hearing Surfaces on said disk and ring, a lever pivoted to rotate about the axis of eaid Spindle and arranged to engage said trunhlers alternatively to release one or the other of said rollers, a device rigidly eeiineeted 1vith said platen for rotatingfsaid platen, and a Second deviee having a liinited movement relative to said rst mentioned rotating device, said second device being arranged to operate said lever to release one of said rollers and subsequently rotate said platen independently of said line spaeing Wheel.

l2. The combination With a typewriter platenl and a spindle therefor, of a line spaein Wneel mounted to rotate relative to Said l eten, roller clutch mechanism for holdin Said platen and line spaeing Wheel to r in unison with one another, a finger "eneel Connected with Said spindle for rotating said platen and line spacing; Wheel While connected by Said eluteh inen'iloer, a Second linger Wheel having a liinited rotation relative to said plefein nieehanisin operated by the initial rotation ot' said Second linger Wheel "or releasingsaid elnteh mecha- -fiingg said platen to Said ehiteh ineehanlonr has heen released.

ln testimony .,vh reef l have Signed my naine to this speeiiieation on thiS 9th day of October, A. D. 1920.

OTTO A. HOKANSON. 

